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41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
/** Used to compose unicode character classes. */
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const rsAstralRange = '\\ud800-\\udfff'
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const rsComboMarksRange = '\\u0300-\\u036f'
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const reComboHalfMarksRange = '\\ufe20-\\ufe2f'
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const rsComboSymbolsRange = '\\u20d0-\\u20ff'
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const rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange
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const rsVarRange = '\\ufe0e\\ufe0f'
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/** Used to compose unicode capture groups. */
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const rsAstral = `[${ rsAstralRange }]`
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const rsCombo = `[${ rsComboRange }]`
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const rsFitz = '\\ud83c[\\udffb-\\udfff]'
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const rsModifier = `(?:${ rsCombo }|${ rsFitz })`
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const rsNonAstral = `[^${ rsAstralRange }]`
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const rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}'
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const rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]'
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const rsZWJ = '\\u200d'
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/** Used to compose unicode regexes. */
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const reOptMod = `${ rsModifier }?`
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const rsOptVar = `[${ rsVarRange }]?`
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const rsOptJoin = `(?:${ rsZWJ }(?:${ [rsNonAstral, rsRegional, rsSurrPair].join('|') })${ rsOptVar + reOptMod })*`
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const rsSeq = rsOptVar + reOptMod + rsOptJoin
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const rsSymbol = `(?:${ [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') })`
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/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
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const reUnicode = RegExp(`${ rsFitz }(?=${ rsFitz })|${ rsSymbol + rsSeq }`, 'g')
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/**
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* Converts a Unicode `string` to an array.
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*
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* @private
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* @param {string} string The string to convert.
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* @returns {Array} Returns the converted array.
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*/
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function unicodeToArray(string) {
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return string.match(reUnicode) || []
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}
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export default unicodeToArray
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